[DNM] Use @dataclass(slots=True) (needs Python >=3.14)

[crusaderky]

Follow-up to #8793 and #8824
Python 3.10 introduces @dataclass(slots=True).

[EDIT]

@dataclass(slots=True) is broken in older version of Python whenever subclassing is involved.
It is fixed in Python 3.14.

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    14 files   -     16      14 suites   - 16   2h 6m 35s ⏱️ - 8h 40m 11s
 4 068 tests  -     43   3 871 ✅  -    132   97 💤  -     8  100 ❌ + 97 
13 546 runs   - 46 236  12 598 ✅  - 44 702  549 💤  - 1 930  399 ❌ +396 

For more details on these failures, see this check.

Results for commit 9db57ef. ± Comparison against base commit ae1e686.

This pull request removes 45 and adds 2 tests. Note that renamed tests count towards both.

distributed.cli.tests.test_dask_ssh
distributed.dashboard.tests.test_components
distributed.dashboard.tests.test_scheduler_bokeh
distributed.dashboard.tests.test_worker_bokeh
distributed.deploy.tests.test_old_ssh
distributed.deploy.tests.test_ssh
distributed.diagnostics.tests.test_nvml ‑ test_1_visible_devices
distributed.diagnostics.tests.test_nvml ‑ test_2_visible_devices[0,1]
distributed.diagnostics.tests.test_nvml ‑ test_2_visible_devices[1,0]
distributed.diagnostics.tests.test_nvml ‑ test_enable_disable_nvml
…

distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---nanny]
distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---no-nanny]

This pull request removes 35 skipped tests and adds 2 skipped tests. Note that renamed tests count towards both.

distributed.cli.tests.test_dask_ssh
distributed.dashboard.tests.test_components
distributed.dashboard.tests.test_scheduler_bokeh
distributed.dashboard.tests.test_worker_bokeh
distributed.deploy.tests.test_old_ssh
distributed.deploy.tests.test_ssh
distributed.diagnostics.tests.test_nvml ‑ test_1_visible_devices
distributed.diagnostics.tests.test_nvml ‑ test_2_visible_devices[0,1]
distributed.diagnostics.tests.test_nvml ‑ test_2_visible_devices[1,0]
distributed.diagnostics.tests.test_nvml ‑ test_gpu_metrics
…

distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---nanny]
distributed.cli.tests.test_dask_worker.test_listen_address_ipv6[tcp:..[ ‑ 1]:---no-nanny]

This pull request skips 25 tests.

distributed.cli.tests.test_dask_scheduler ‑ test_signal_handling[Signals.SIGINT]
distributed.cli.tests.test_dask_scheduler ‑ test_signal_handling[Signals.SIGTERM]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_scheduler[Signals.SIGINT]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_scheduler[Signals.SIGTERM]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_worker[Signals.SIGINT-Nanny]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_worker[Signals.SIGINT-Worker]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_worker[Signals.SIGTERM-Nanny]
distributed.cli.tests.test_dask_spec ‑ test_signal_handling_worker[Signals.SIGTERM-Worker]
distributed.cli.tests.test_dask_worker ‑ test_signal_handling[Signals.SIGINT---nanny]
distributed.cli.tests.test_dask_worker ‑ test_signal_handling[Signals.SIGINT---no-nanny]
…

♻️ This comment has been updated with latest results.